13
4
Instructions for Access Tube Installation
The following instructions should be taken account of:
The ramming head, the TECANAT
access tube and the internal steel guide
and protection tube are one unit.
The internal protection tube has to lie on
the cutting shoe of the access tube,
before it can be fixed with a screw to the
ramming head. This fixation is
necessary to secure the shoe against
being squeezed out by the returning
force of the hammer-blow.
The access tube, however, is fixed to
the ramming head by the clamp device.
Both fixation screw and clamp device
should be controlled during the
installation process and be re-adjusted
with the adjustable levers if necessary.
The screw auger, that moves easily
within the guide tube is used to drill out
soil to about 0,1m below the cutting
shoe. Depending on soil homogeneity,
the tube is then hammered 5-10 cm into
the soil with a plastic hammer (with open
support pillar clamps!). The guide tube is
not used for making the hole in the first
instance because this could result in soil
compaction around the hole, which
would lead to higher measurement
values.
The access tube support pillar with three
ground anchors avoids vibrations that
would cause air gaps. Then the clamp of
the support pillar must be closed and the
soil can be removed with the screw
auger. When the tube reach the support
pillar, it must be removed and the
access tube can be inserted to the final
depth without the support pillar.
4.1
Fixing of the rubber bung
The rubber bung can be pushed into the access tube with the screw- adapter and the handle (the
screw-adapter can be replaced instead of the screw auger) and can be fixed at the bottom of the
access tube with two turns of the handle. If pushing down the rubber bung turns out to be difficult, just
apply some talcum powder on the rubber bung sides and into the access tube.
A plastic collar should be mounted around the tube to prevent water from running down the tube wall
and a plastic cap to protect the tube against rain.
Ramming Head
with Clamp Device
Pull for best
position
Fixation-
Screw
Summary of Contents for TRIME-FM
Page 1: ...TRIME FM User Manual ...
